Abstract:
A sustained release and bio-degradable nano-particle of a poly(DL-lactide-co-glycolide) copolymer is provided to release ciprofloxacin HCl gradually through controlling of physicochemical characteristics and drug release characteristics by encapsulating the ciprofloxacin into polylactide glycolide. A sustained release and bio-degradable nano-particle of a poly(DL-lactide-co-glycolide) copolymer is characterized in that it has a particle size of 100-500 nanometers and the poly(DL-lactide-co-glycolide) copolymer encapsulates ciprofloxacin HCl. A method for preparing the nano-particle comprises the steps of: (a) dissolving polylactideglycolide in dichloromethane to have a concentration of 2-6 weight/volume%; (b) dissolving ciprofloxacin in distilled water to have a concentration of 1-2 weight/volume%; (c) after mixing the solution obtained from the step(a) with the solution obtained from the step(b) in a weight ratio of 8-10:1, treating the mixture with an ultrasonic homogenizer with an output of 30-40 watts for 1-3 minutes per 10 ml to prepare a water in oil emulsion; and (d) after putting the W/O emulsion in an aqueous solution of polyvinyl alcohol having a concentration of 1.0 weight/volume%, treating the solution with a high-pressure homogenizer under a pressure of 600-800 bar with one minute cycle per 100 ml for 5-7 cycles to prepare a W/O/W emulsion. Further, a 4.5 to 5.0 wt.% of ciprofloxacin HCl is comprised in a 100 wt.% of nano-particle, and the ciprofloxacin HCl is emitted from the nano-particle for 10 days or more.
Abstract:
Provided are a retinol encapsulated water-soluble chitosan nano-particle which is able to secure the stability and water-solubility of retinol, and a method for preparing the retinol encapsulated water-soluble chitosan nano-particle. The retinol encapsulated water-soluble chitosan nano-particle is characterized in that it has low molecular weight of 1,000-50,000Da and a particle size of 50-150 nanometers. The method comprises the steps of: (a) preparing a low molecular weight water-soluble chitosan solution; (b) preparing a retinol solution; (c) mixing the retinol solution with the chitosan solution and agitating it; and (c) freeze-drying the mixture solution.
Abstract:
본 발명은 트랜스페린 수용체 영상제제 및 그 제조 방법에 관한 것으로, 보다 상세하게는 방사성핵종으로 표지된 HYNIC-키토산-트랜스페린 배합체를 함유하는 트랜스페린 수용체 영상제제 및 그 제조 방법에 대한 것으로서, 본 발명에 따른 트랜스페린 수용체 영상제제는 세포독성이 없을 뿐만 아니라 표지효율이 높아 빠른 시간 안에 트랜스페린 수용체를 표적하여 감염부위의 영상을 얻을 수 있으므로 생체의 염증 및 종양과 같은 병리적 상태를 조기에 진단 및 치료하는 조영제로 유용하게 이용될 수 있다. 핵의학 영상, 감마 영상, 조영제, 키토산, 트랜스페린, HYNIC, 테크네튬
Abstract:
Provided are a water-soluble chitosan oligosaccharide having high purity which has an average molecular weight of 1000-11000 Da and an average molecular weight distribution of 1-1-1.5, a method for preparing the same, and a composition comprising the same. The water-soluble chitosan oligosaccharide has an average molecular weight of 1000-11000 Da, and an average molecular weight distribution of 1-1.5. The method for preparing the water-soluble chitosan oligosaccharide comprises the steps of (i) classifying/separating a water-soluble chitosan oligosaccharide according to molecular weight by using ultrafiltration membrane, (ii) removing and lyophilizing impurities of water-soluble chitosan oligosaccharide solution obtained respectively, (iii) precipitating the lyophilized water-soluble chitosan oligosaccharide in organic solvent to obtain a water-soluble chitosan oligosaccharide of powder type, and (iv) drying the water-soluble chitosan oligosaccharide of powder type under vacuum.
Abstract:
PURPOSE: A method for preparing a water-soluble free amine chitosan is provided, to obtain a pure water-soluble free amine chitosan with a molecular weight of 1,000-100,000 Dalton. CONSTITUTION: The method comprises the steps of treating a solution of salts of an organic acid or an inorganic acid of chitosan oligosaccharide with a trialkylamine; adding an organic solvent to the solution to recover the chitosan oligosaccharide by removing an organic acid or an inorganic acid in the form of a trialkylamine salt; and treating the chitosan oligosaccharide solution with an inorganic acid and purifying the solution with an activated carbon/ion exchange resin column. Preferably the organic acid is selected from the group consisting of lactic acid, acetic acid, propionic acid, formic acid, ascorbic acid and tartaric acid; and the inorganic acid is selected from the group consisting of HCl, HNO3 and H2SO4.
Abstract:
본 발명은 키틴에 고정화한 효소를 이용하여 키토산 올리고당을 연속적을 생산하는 방법에 관한 것으로, 효소 활성의 저하가 없고, 막반응기에서의 파울링현상을 효과적으로 제어할 수 있으므로 연속적으로 키토산 올리고당을 대량으로 생산할 수 있다. 또한, 본원 발명은 기존의 회분식법에 비해 값비싼 키토산 가수분해효소의 효율적인 사용을 가능케하므로 보다 경제적인 생산방법이다.
Abstract:
Provided is an anticancer agent-encapsulated and a hydrophobic bile acid-conjugated hydrophilic chitosan oligosaccharide nanoparticle which shows high encapsulation rate of anti-cancer agent, high cytotoxicity against cancer cells and continuous anti-cancer effect by releasing the anti-cancer agent for a long period of time in vivo so as to be usefully used for chemotherapy. The hydrophilic chitosan oligosaccharide nanoparticle encapsulates an anti-cancer agent and is conjugated with a hydrophobic bile acid which is selected from the group consisting of lithocholic acid, deoxycholic acid, cholic acid, chenodeoxycholic acid, 7-oxo-lithocholic acid and 5beta-cholanic acid. The method comprises the steps of: (a) preparing a bile acid solution by dissolving a hydrophobic bile acid together with an activating agent in a solvent with agitation to activate the bile acid; (b) dissolving a hydrophilic chitosan oligosaccharide in a solvent to prepare a chitosan oligosaccharide solution; (c) reacting the chitosan oligosaccharide solution with the activated bile acid solution to prepare a bile acid-conjugated chitosan oligosaccharide solution; (d) dialyzing and filtering the bile acid-conjugated chitosan oligosaccharide solution to prepare an auto-coagulative type bile acid-conjugated chitosan oligosaccharide nanoparticle solution; and (e) adding an anti-cancer solution to the auto-coagulative type of bile acid-conjugated chitosan oligosaccharide nanoparticle solution so as to encapsulate the anti-cancer agent into the nanoparticle.
Abstract:
본 발명은 트랜스페린 수용체 영상제제 및 그 제조 방법에 관한 것으로, 보다 상세하게는 방사성핵종으로 표지된 HYNIC-키토산-트랜스페린 배합체를 함유하는 트랜스페린 수용체 영상제제 및 그 제조 방법에 대한 것으로서, 본 발명에 따른 트랜스페린 수용체 영상제제는 세포독성이 없을 뿐만 아니라 표지효율이 높아 빠른 시간 안에 트랜스페린 수용체를 표적하여 감염부위의 영상을 얻을 수 있으므로 생체의 염증 및 종양과 같은 병리적 상태를 조기에 진단 및 치료하는 조영제로 유용하게 이용될 수 있다. 핵의학 영상, 감마 영상, 조영제, 키토산, 트랜스페린, HYNIC, 테크네튬
Abstract:
PURPOSE: Provided is a method for manufacturing fish bone powers and peptides which facilitate the absorption of calcium, thereby providing calcium and facilitating the absorption of calcium to be used as a row material for foods, beverages, pharmaceuticals and the like. CONSTITUTION: The manufacturing method comprises the steps of: reacting fish wastes, which are obtained from the process of making a fish filet, with enzyme extracted from the insides from a fish, such as a tuna and a mackerel; preparing fish bone powders containing rich calcium components from the reaction deposition; and preparing peptide components facilitating he absorption of calcium from the reaction supernatant.